The heterogeneity statistic I(2), interpreted as the percentage of variability due to heterogeneity between studies rather than sampling error, depends on precision, that is, the size of the studies included.

Attention Score in Context

This research output has an Altmetric Attention Score of 6. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 17 February 2020.

All research outputs

#3,565,047

of 15,055,678 outputs

Outputs from BMC Medical Research Methodology

#498

of 1,403 outputs

Outputs of similar age

#41,949

of 192,500 outputs

Outputs of similar age from BMC Medical Research Methodology

#1

of 1 outputs

Altmetric has tracked 15,055,678 research outputs across all sources so far. Compared to these this one has done well and is in the 76th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.

So far Altmetric has tracked 1,403 research outputs from this source. They typically receive more attention than average, with a mean Attention Score of 9.5. This one has gotten more attention than average, scoring higher than 64% of its peers.

Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 192,500 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 78% of its contemporaries.

We're also able to compare this research output to 1 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them